Change in coreboot[master]: soc/intel/common/uart: Move fixed LPSS_UART IRQ selection to a new file

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Furquan Shaikh, Nick Vaccaro, Patrick Rudolph.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55828 )

Change subject: soc/intel/common/uart: Move fixed LPSS_UART IRQ selection to a new file
......................................................................

Patch Set 2:

(2 comments)

File src/soc/intel/common/block/uart/Makefile.inc:

https://review.coreboot.org/c/coreboot/+/55828/comment/eaa7610b_1b3bbc94 
PS2, Line 9: legacy
> By legacy, I guess you mean the legacy behavior of assigning IRQs in FSP and using macros to determi […]

fair point, i'll find a better name

File src/soc/intel/common/block/uart/uart.c:

https://review.coreboot.org/c/coreboot/+/55828/comment/d800a8b1_1fd26872 
PS2, Line 212: uart_get_fixed_irq(dev)
> Currently, this gets used only for one board (hermes) which is cannonlake. […]

Good eye! Then it may be worth it; probably would only take a few days to get it working for cannonlake ... let me look at that.